MEMPHIS, Tenn. — There was a little male nudity during the official UFC 107 weigh-in Friday at the FedEx Forum.

A lot of male nudity, actually.

Six different fighters had to remove all their clothing in order to make weight for Saturday's fights. It happened so much, in fact, that officials from the UFC and the Tennessee State Athletic Commission stopped the process several times to make sure the scale had been properly balanced.

"It was balanced before the weigh-ins, but it might have been a couple ounces off," said Jeff Mullen, the executive director of the Tennessee commission. "We rebalanced it again before the main event weigh-in."

In the end, all fighters that initially came in a pound or two over made weight by shedding their boxers or shorts. Any fighter that comes in overweight has two hours to either lose the weight or forfeit a percentage of his purse.

After lightweight champion B.J. Penn weighed in at 155, top lightweight contender and main-event fighter Diego Sanchez weighed in one pound heavy at 156. That normally would be fine, but in championship bouts fighters don't receive the typical extra pound of leeway.

After removing his shorts, Sanchez came in at 154.5 pounds, meaning his shorts alone weighed 1.5 pounds.

While that seemed puzzling to many in attendance, Mullen said that the fighters were all losing between 1-to-1.5 pounds by removing all their clothing.

"Once he removed his shorts he weighed 154.5," Mullen said. "Every fighter that was taking his shorts off was losing about 1.5 pounds, that must be what those things weigh."

Not every fighter was able to make weight simply by stripping, as a middleweight fight between Alan Belcher and Wilson Gouveia was changed to a catchweight bout of 195 pounds when one of the fighters missed. The switch happened when Gouveia announced he was stuck at 190 pounds and couldn't get lower.

Former UFC heavyweight champion Frank Mir weighed in at a bulky 264.5 pounds, 20 pounds heavier than he's been in recent fights. Mir was involved in probably the most interesting staredown of the event, as his opponent, Cheick Kongo, refused to look at him and turned his back.

Conor McGregor became more than UFC featherweight champion with his 13-second knockout victory over Jose Aldo. He became the UFC. McGregor transcended into a level above any other fighter by living up to every promise about what he’d do to the only previous 145-pound champion in UFC history. And he set a slew of records doing it, including creating a live gate of $10.1 million at the MGM Grand Garden Arena. UFC CEO Lorenzo Fertitta later said McGregor would become the first man to make more than $100 million in the octagon. The new era didn’t stop with McGregor. Luke Rockhold unseated previously undefeated Chris Weidman in the main event to become the seventh middleweight champion in UFC history.